// templa 定义组件的ui结构 
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <el-row :gutter="20">
            <!-- 搜索框区域 -->
            <el-col :span="8">
                <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                    <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
                </el-input>
            </el-col>
            <!-- 添加按钮区域 -->
            <el-col :span="4">
                <el-button type="primary" @click="goAddpage">添加商品</el-button>
            </el-col>
        </el-row>
        <!-- 表格区域 -->
        <el-table :data="goodslist" border >
          <el-table-column type="index"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
          <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
          <el-table-column label="创建时间" prop="add_time" width="140px">
           <template slot-scope="scope">
              {{scope.row.add_time | dateFormat}}
           </template>
          </el-table-column>
          <el-table-column width="130px">
              <!-- 操作 -->
              <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
              </template>
          </el-table-column>
        </el-table>    

         <!-- 分页区域 -->
         <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[3, 5, 10, 15]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total" background>
        </el-pagination>    
    </el-card>
  </div>
</template>

// script 定义当前组件的行为
<script>
export default {
  // data私有数据节点
  data() {
    return {
        // 查看参数对象
        queryInfo: {
            query: '',
            pagenum: 1,
            pagesize: 10
        },
        // 商品列表
        goodslist:[],
        // 数据总条数
        total:0
    }
  },
  // created 生命周期函数
  created() {
      this.getGoodsList()
  },
  // methods 事件处理函数
  methods: {
    //   根据分页获取对应的商品列表
      async getGoodsList(){
          const {data : res} = await this.$http.get('goods',{
              params: this.queryInfo
          })

          if(res.meta.status !== 200){
              return this.$message.error('获取商品列表失败！');
              
          }

          // this.$message.success('获取商品列表成功！');
          // console.log(res.data);
          this.goodslist = res.data.goods
          this.total = res.data.total          
      },
      handleSizeChange(newSize){
        this.queryInfo.pagesize = newSize
        this.getGoodsList()

      },
      handleCurrentChange(newPage){
        this.queryInfo.pagenum = newPage
        this.getGoodsList()

      },
      // 点击删除 删除商品
      async removeById(id) {
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        console.log(confirmResult);
        if(confirmResult !== 'confirm') {
          return this.$message.info('已取消删除！')
        }

        const {data : res} = await this.$http.delete(`goods/${id}`)
        if(res.meta.status !== 200){
          return this.$message.error('删除失败！')
        }
        this.$message.success('删除成功！')
        this.getGoodsList()        
      },
      // 点击添加商品按钮 跳转添加商品页面
      goAddpage(){
        this.$router.push('goods/add')
      }
  }
}
</script>

// 初始化文件样式  scoped指令 防止组件之间的样式冲突问题
<style lang="less" scoped>
</style>